2.4.0: Nullable

• Merged PR #10: Support unmarshalling to nullable types - @thekid

2.3.0: Custom logic

• Added support for PHP 8.1's https://wiki.php.net/rfc/enumerations
  (@thekid)
• Merged PR #8: Refactor mapping for classes inside util, making
  them overrideable
  (@thekid)
• Merged PR #7: Add mapping() and resolving() to supply custom
  (un)-marshalling logic
  (@thekid)

2.2.0: XP 12 compatibility

• Made compatible with XP 12 - @thekid

2.0.0. Scalar array unmarshalling

The second major release changes the way scalars are unmarshalled to arrays: Previously, they resulted in an empty array and a PHP warning
being raised. Now, they result in an array of themselves.

• Merged PR #4: Unmarshal scalars and null to arrays - @thekid
• Merged PR #5: Migrate to new reflection API - @thekid
• Merged PR #3: Migrate to new testing library - @thekid

1.1.1: XP 11, PHP 8.1 compatibility

• Made library compatible with XP 11 - @thekid
• Made compatible with PHP 8.1 - add ReturnTypeWillChange attributes to
  iterator, see https://wiki.php.net/rfc/internal_method_return_types
  (@thekid)

1.1.0: PHP custom object serialization support

• Merged PR #1: Add support for __serialize() and __unserialize()
  (@thekid)

1.0.1: One-arg constructor fix

• Only construct objects with one-arg constructors if their parameter
  accepts the argument
  (@thekid)

1.0.0: Drop PHP5

The first major release changes no functionality, but drops support for PHP 5, which has been EOL for almost a year at the time of this release.

• Implemented xp-framework/rfc#334: Drop PHP 5.6. The minimum required
  PHP version is now 7.0.0!
  (@thekid)

0.3.2: XP10 compatibility

• Made compatible with XP 10 - @thekid

Class shadowing fix

• Fixed shadowing of util.data.Iterator class from xp-forge/sequence
  (@thekid)